Self-feeding burner



Sept. 6, 1927.

J. J. M COY SELF FEEDING'BURNER Filed Feb. 18, 1926\ 2 Sheets-Sheet l Nw N dgl )1 INVENTOR c /aiiz- Jflk} Sept. 6, 1927. 1,641,545

J. J. M COY SELF FEEDING BURNER Filed Feb. 18, 1926. 2 sheets-sheet 2 *5\v k W ATTORNEY Patented Sept. 6, 1927.

hair a JOHN J. MCCOY, MILTON, OREGONI SEIJF FEEDING- BURNER;

Applicationi filed February 18, .1926. Serial No. 88,985;

This invention relates to self: feeding; burnersand' has as-one ofits-objects=to pro-' videa: combustion chamber th at I may beattaeh'edzto orrconnectedwith furnaces and the. like.

Another of the objects-of this invention is to provide 21; self;feeding; burner; that is adaptable to fuellofz:various-kinds, ,such assawdust; finewcoal and the like;

proyideaa self'feedin; burner that-will automatically feed itself. A'further; objeetr-ofmthis:invention-v1s to provideiatzselfifeedin gburnerhaving a means for 'regulating-the?combustion.

A further? object; of this invention is: to provide a self feedingburner thatiisadapt-'- able' to waste? products 1- or matter, and thatis economical 1nrcombust1on';

' drawings in which+- Fig; 1? is side=:elevation :of the self :feed ingburner, partly in section, shown-attached to; a; furnace;

Fig: 25 is a :cross section of the combustion;

chamber takenzon th e line '2-2Lof Fig, 11;,

8' is a plan View of: the top; plate, Fig. .bisa plan View of :thethimble'showhopper with relationto the thimble;

Fig. i 5 is a! crosssection takenlaterally through the=furnace end:offthe combustionzchamber;

Fig-.2 6: is a, cross; secti0n-;taken-: laterally through thecombustion: chamber; at the thimble; ancl'i Fig." 7 is ,a plan View. of:the cover of 1 the storage chamber. 7

Having: reference to the; drawings, v like numerals refer to like partsthroughoutthe several; views,v andthe "111111181 3171; refers to thedevice: as a Whole; comprising generaiia combustion chamber 2, andarstoragechamber 8,: and :the device 2-is-* shown in Fig. 1 a of the vdrawings as-apphed :to a-heater 4, portrayed as a furnace for heatingbuildings.

The combustion chamber 2, is attached to the heater 4, in any suitablemanner,- or as shown, and consists of an elongated chambar 5, whichis=dividediinto-two compartmen-ts, one of which,v the front compartment?is termed'ythe cold'rcompartment, designated by the numeral 6-,and' Ithe second :of. which A; further object: of' this-inventionis to Withthese and other: objec-tsirt View reference' is; now; had: t0- the;-accompanying,

ing; therrelative position of the collar; of the.

is termed the hot: compartment,v designatedi by the numeral 7 J i i aThe 1 cold 1 compartment 6, is so. called? as allidraft entering thecombustion"chamber 2g=.- entersth'rough the cold compartment, aswill behereinafter explained, and! the heatf is; 0 carried on with vthe draftthrough the-wh-oth compartment 7, Vto'the-heater.

As the -h0tcompartmentt is--required1 to: i

stand an intensive heat, it is constructedfin; its-upper;side-Withfirebrick- 8; or other:suitable heat.resistingmaterial,andvathis'corrastruction': is in. the'form of. an ar;ch.9; asy

shown in iFig." '5,andthe archtissdesigned;

is -mounted:0n the top: 12,, of. therfcombus-e tion. chamber byimeansofarsuppo-rtings plate 13-, that is preferably made-.integral with. the athimble 11 Y The thimble being-:oval is arra nged so that its: majoraxisis positioned/laterally, or,

across the combustion chamber,, while its? minor axis is positioned:longitudinally; of? the .-chamberand is arranged :with' its-zloweri enddepending into the chamber.

By thiss for1n-,-and* arrangementithes fuel is deposited in thecombustion chamberainrap pile 14L, Wlth-ltS greatest dimensionposiwtioned laterally in the chamber, and: also :in;

a ;manner-that' considerable space l5 gisrleft. on' -eachssi-de oftheifuel betweem the fue1,-; and ;the side walls -16, of? the chamber;thepurpose of- Which. will be presentlyJ-ex plaineda Draft. holes--17,are formed in: the-plata adjacent to the front side of thethimblezll,-

andarein communication withqthe interior of the cold compartment. 6,through com-v plemental holes 18, left-for the purpose &in

the top of the combustion chamber,v and these actto supplya down drafttothelfuel .v

ile 14; v The thimble is also provided -Withnan, up,--

Ward extension 19, that. adds length.thereto.;

- 22, and on the bottom of which is a collar 23,

that engages the thimble 11.

The upper part of the storage chamber is preferably circular and. itsform gradually changes from the circular to an oblong at said collar,the collar forming the outlet thereof. I

The outlet is restricted and has shorter major axis thanthe thimble, itscontour providing for a vent 24, at eacn end of the out 1 let, betweenit and the ends of the major axis of the thimble, by which means acurrent of air will pass downward through the loosely confined fuel inthe thimble. and thus provide air lubrication for the passage of thefuel therethrough, the loose accumulation. of

the fuel in the thimble being accomplished by passing the fuel throughtherestricted discharge outlet 23, of the storage chamber.

The purpose of the vent hole 22, is to provide a means to prevent smokeand gases from the burning fuel from entering the storage chamber and,by coming in contact with the cold fuel, to become condensed to form acreosote or wood tar substance that by adhering to the side walls of thestorage chamber, would change its smooth surface to a rough and adhesivesurface by the accumulation thereon of the viscid substance. to whichthe fuel would adhere. This also applies to the vents 24, as both theventhole 22 and the vents 24 provide for a down draft 'superinduced bynatural upward draft through the heater shown).

Slidably and adjustably mounted in the combustion chamber 2, andpositioned in the cold compartment 6, is a grate 25. This grate may bedesigned in cross section as shown or may be of any design that willbreak up the draft from the draft door 26. into jets of air, and thatwill direct the jets around and over the surface of the fuel. The grateis adjusted by means of a lever 27, pivotally attached to the front ofthe combustion chamber, and is connected to the grate by a rod 28,whereby the grate may be moved forward and backward.

It will now be noted that there is a draft from the draft door 26, thatpasses in thin streams or jets over the surface of the fuel; that a'downdraft from the draft holes 17, in the plate 13, will direct jets of airover the upper surface of the fuel; and that the and chimney (not draftabove mentioned as an air lubricant for the thimble, will pass over thetop ends of the. pile adjacent to the bottom of the thimble.

By this arrangement, and by providing draft openings throughout theheight of the grate, and further'by providing for an air space betweenthe upper part of the pile and the side walls, an air current willsurround the fuel (with the exceptions of where the fuel contacts thegrate) and by this means will cause a constant combustion to take place.It may here be noted that it is understood that a certain amount of theair of the draft will obviously pass through the fuel, depending uponthe shape and size of the particles forming the fuel.

In use the storage chamber is filled with fuel. Now as the fuel isplaced in the storage chamber the pile ll, builds up beneath until itmeets the bottom of the thimble, then the thimble and the storagechamber become full. v

A lightedpaper now placed at the draft door will be drawn by the draftagainst the front side of the grate and the flame will pass through thegrate orifices and will ignite the fuel.

By drawing the grate away from the pile more openings thereof areexposed to direct additional jets of air against the fuel, which willobviously cause a hotter and more rapidly burning fire, and as the grateis advanced toward the pile the reversed action will be true. 1

As the outer part of the fuel is consumed, other fuel is permitted todrop and take its place, and through the shape of the storage chamberthe fuel will fall from the sides to the center. And through thechanging shape of the chamber there will bea slight change in thedirection of falling as the shape changes from the circular to the oval,with the accompanying gradual change of the level of the fuel in thestorage chamber.

This change prevents the fuel congesting and permits it to pass freelythrough the restricted discharge openingwhich permits the fuel to fallinto the thimble and to retain its loose condition therein.

Having thus described my invention, I claim:

1. In a self feeding burner, a combustion chamber provided with a coldcompartment and a hot compartment, said hot compartment being arched incross section to provide a directing channel for the hot gases, athimble chamber and depending into said chamber, a storage chamberprovided with a restricted outlet, mounted in said thimble, said outlethaving less dimensions than said thimble,

thereby providing for air lubrication in said mounted on said combustion,thimble mounted on said combustion chamber in a manner to depend intosaid chamber, and positioned in said hot compartment, a storage chamberprovided with a restricted outlet, and having a form gradually changingfrom the circular to an oval at said outlet, and slidably mounted insaid thimble in a manner to form a vent at each end of said oval outletto provide air lubrication in said thimble, and a slidably andadjustably mounted grate positioned in said hot compartment, andadjacent to said thimble, in a manner to direct a draft over the surfaceof the fuel.

3. In a self feeding burner, a combustion chamber provided with a coldcompartment and a hot compartment, a plate mounted on said combustionchamber and provided With a depending thimble, said thimble beingpositioned in said hot compartment, a storage chamber provided with arestricted outlet having a form gradually changing from a circular to anoval at said outlet, and

slidably mounted in said thimble in a' manner to form a vent at each endof said oval outlet to provide air lubrication in said thimble, aslidably and adjustably mounted grate positioned in said combustioncham- 1 JOHN J. McCOYQ

